You can choose btw paid and free 'shadowing' programs like DeepFreeze,shadowUser,PowerShadow.
You can choose btw many a firewall...
The same with antivirus programs.......
Not to mention HIPS: you have SSM paid &Free,ProSecurity paid and free etc.etc.

IMHO since many years in the realm of antitrojans there was only one PAID program worth being paid.......